ABSTRACT
(Diagnostic Radiology) The term object–film distance (OFD) is used in planar x-ray radiology to describe the distance between the central axes of the object being imaged and the surface of the film. The distance influences parameters such as geometric magnification and image distortion. In modern digital radiology where film is no longer used, the distance between the object and the detector is called the object–detector distance (ODD) or the object–image receptor distance (OID) (Figure O.1). Distance metrics in planar radiography. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429489969/96b2ec31-f283-4acc-8d1e-63ca436470d0/content/figO_1_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
